<template>
  <van-nav-bar
    :title="$route.meta.title"
    v-show="$route.meta.isShowNav"
    @click-left="onClickLeft"
    :left-arrow="$route.meta.isShowBack"
    fixed
    placeholder
    style="height: 46px"
  />
  <router-view></router-view>
  <tab-bar v-if="isShowTabbar"></tab-bar>
</template>
  
<script setup>
import TabBar from './components/TabBar.vue'
import { useRoute } from 'vue-router'
import { ref, watch, onMounted } from 'vue'
import { useRouter } from 'vue-router'
import { getUser } from './api'
import useUser from './stores/user'
  
const { user, updateUser } = useUser()

onMounted(() => {
  if (user.isLogin) { loadUser()
  } 
})

const loadUser = async () => { const data = await getUser()
  updateUser({
    isLogin: true,
    username: data.username, 
    avatar: data.avatar
  }) 
}


const route = useRoute()
const isShowTabbar = ref(true)

const router = useRouter()
const onClickLeft = () => { 
  if (history.length > 1) {
    router.back()
  } else {
    router.push({ name: 'home' })
  }
}
  
// 监听路由中的 isTab 是否为 true，如果为 true，展示底部 TabBar
watch(
  () => route.meta, val => {
  isShowTabbar.value = val.isTab
  }
)
</script>
  
<style>
#app {
  color: #2c3e50;
  line-height: 24px;
  --van-nav-bar-background: #ff8000;
  --van-nav-bar-title-text-color: #fff;
  --van-nav-bar-icon-color: #fff;

}
</style>